Realistic microscopic approach to deep inelastic scattering of electrons off few-nucleon systems

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.1100· OSTI ID:6963687

Ciofi degli Atti, C ^[1]; Liuti, S ^[2]

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1. Department of Physics, University of Perugia, Via A. Pascoli, I-06100 Perugia, Italy (IT) Istituto Nazionale di Fisica Nucleare, Sezione Sanita, Viale Regina Elena 299, I-00161 Roma, Italy (IT)
2. Istituto Nazionale di Fisica Nucleare, Sezione Sanita, Viale Regina Elena 299, I-00161 Roma, Italy (IT)

The contribution of the nucleonic component to deep inelastic lepton scattering off {sup 2}H, {sup 3}H, {sup 3}He, and {sup 4}He nuclei is analyzed in terms of momentum distributions and spectral functions obtained from few-body calculations which employ realistic nucleon-nucleon interactions. The nuclear structure function is evaluated within the framework of the convolution model taking relativistic effects into account by means of the flux factor. A comparison with previous calculations performed with a nonrelativistic normalization of the spectral function and using, in the case of {sup 4}He, an independent particle model, is presented. It is shown that short-range and tensor correlations resulting from realistic nucleon-nucleon interactions strongly increase the nucleon mean removal and kinetic energies and, consequently, enhance the calculated European Muon Collaboration effect in the direction suggested by the experimental data in the region 0.2{le}{ital x}{le}0.7; for {ital x}{le}0.2 and {ital x}{ge}0.7, an appreciable discrepancy between theory and experiment still persists and the difficulties in giving an interpretation of the effect in the whole range of {ital x}, in terms of nucleonic degrees of freedom only, are pointed out. The role of {ital Q}{sup 2} rescaling is analyzed; it is found that present experimental data seem to require only a small increase of the quark confinement size for a nucleon imbedded in the nuclear medium. The nuclear structure function for three-nucleon systems is calculated in the region {ital x}{gt}1, where it is shown to be very sensitive to the correlation structure of the nucleon spectral function.

• OSTI ID: 6963687
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
DEUTERIUM TARGET
DIAGRAMS
ELECTRON REACTIONS
EMC EFFECT
EXTENDED PARTICLE MODEL
FEYNMAN DIAGRAM
FIELD THEORIES
FUNCTIONS
GENERAL RELATIVITY THEORY
HADRON-HADRON INTERACTIONS
HELIUM 3 TARGET
HELIUM 4 TARGET
INELASTIC SCATTERING
INTERACTIONS
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
QUARK MODEL
RELATIVITY THEORY
SCATTERING
SPECTRAL FUNCTIONS
STRUCTURE FUNCTIONS
TARGETS
TRITIUM TARGET